Trimmer for sewing machines



Dec. 22, 1925- ,8

A. M. BATES ET AL TRIMME FOR SEWING MACHINES Filed Jan. 26, 1924 2 Sheets-Sheet 1 Foal-MEIR M 5/9755 Dec: 22, 1925 1,566,811

A. M. BATES ET AL TRIMMER FOR SEWING MACHINES Filed Jan. 26, 1924 2 Sheets-Sheet 2 FIG 5' F182 gnueul'oz HDE MEE. BAY-res HLBEIZT Ava/ 5 32n (Qwg P.........1 Dec. 22, 1925.

UNITED s'ra ADELMEB ML BATES AND ALBERT KRASA, OF CHICAGO, ILLINDIS, ABSIGNOBS T0 BATES VALVE BAG COMPANY, OF CHICAGO, ILLINOIS, A. CORPORATION OF WEST VIRGINIA.

TRIMMER FOB SEWING MACHINES.

Application filed January 26, 1924.. Serial 150. 688,723.

To all whom it may concern."

Be it known that'we, ADELMER M. Burns and ALBERT KnsAl, citizens of the United States,- and residents of Chicago, in the county of Cook and State of Illinois, have invented a new and useful Trimmer for Sewing Machines, which invention is fully set machine granted to Dudley S. Seymour July 6, 1915, No. 1,-l 15,620, although it might be applied with obvious changes to other ma-' chines.

Referring to the drawings forming a part of this specification,

' Fig. 1 is a side elevation of a sewing machine with our tri .ner applied, parts being in section along the line 1--1 of Fig. 2. Fig. 2 is a-front elevation partly in section aiong the line 2-2'of Fig. 1. Fig. 3 is a section showing the operative connection of our trimmer to the main shaft of the machine, and shows these parts along the line 3-3 of Fig. 1. line 4+4 of Fig. 2. Fig. 5 is a detail show-- ing the relation of the tape feeders to the needle.

The feeding and seam-forming parts of the sewing machine are shown in the drawings as being constructed in the same way as the similar parts of the machine described in the above cited patent.

A.- standard 11 supports an overhanging'arm 12 in the end of which there slides a needle bar 13, carrying a needle 14. The needle bar operating lever 15 is connected by a link 16 to an eccentric on the main shaft 17. The main shaft runs through a tubular work support 18. A looper 19 adapted to cooperate with the needle is operated by a carrier 20 and reciprocated by a link 21 connected to the needle operating lever The looper carrying bracket is mounted on a rock shaft which is rocked by a. fork 24 embracing an eccentric on the main shaft 17.

Fig. 4 is a section on the A feed dog 25 is mounted. on an arm of a frame 26. The frame 26 is pivoted to a rock frame 27, which in turn mounted upon a pivot 28, supported in brackets 29. feeding movement of the feed dog is caused by a connection with the main shaft, which operates the rock frame 27. This connection is not shown in the drawings and may be formed in any suitable manner, for example, in the way disclosed in the above cited patent.

The vertical movement of the feed dog is caused by a link 31 which connects a. pivot pin 32, mounted in the frame 26, to a pivot pin 33 on the arm of a rock shaft, not shown. This rock shaft may be operated in any suitable manner, for example, like the corresponding rock shaft in the above cited patent.

The above described parts form no part of our invention and may be constructed in any suitable manner. They are disclosed merely to indicate the manner in which our trimmer may be attached to this type of sewing machine.

Our trimmer consists in a cutter plate 40 and its operating mechanism. The plate reciprocates in a slot. 41 in the presser foot 42 and through a registering slot in the throat plate 43. The plate is fastened by a screw 44 to a knife carrying slide 45, which reciprocates in a guide 4-5. 16 is pivoted at 7 to a lu &8, extending from a bracket 49. The plvot rod 50, by which the frame 26 is pivoted to the frame 27, is extended at the front end of the machine, as at 51. This extension is connected b a link 52 to a pivot pin 53 in the knife guide 16. In this way, the knife guide is oscillated about its pivot- 47, giving the knife substantially co-incidentmovement with the horizontal movement of the. feed dog.

The bracket plate 49 is fastened in any suitable manner to the under side of the tubular work support 18. Lugs 54 depending from the plate 49 support a rock shaft. 55. An arm 56 of this rock shaft is connected by a link 57t0 an eccentric l8 upon the main shaft 17." Another arms-l9 projects from the front end of the rock shaft The The knife guide r for oscillatin means ands-he guicie, and separate means for reciprocating the earner in the guide.

8. In a sewing machine, a feed (10 means to move the feed dog to and from the Work,

means to rccipromte the feed dog in the direction of movement of the Work, a knife mounted separately from the feed dog, con neetlons between the lost said means and the knife for reciprocating the knife simulcarrier slidafily mounted in t e guide, and

operative-means ado. ted to connect an eccentric on the main s aft of the sewing machine with the carrier.

IOJA cutter adapted to be attached to a, sewing machine having e-tnbular work slipport, comprin a knife, means beyond the 'end'of the mec anisin in the Work support for reciprocating the knife in the direction of travel of the Work, and means outside of the work siipportandconneoted ton link actuated by an eccentric on the main shaft for reciFrocating the imifetransverseiy oz? dog for advancing the work, a knife extending across the path of jthe work, 2.

bracket fixed to the bottom of the Work support, a guide pivoted on the bracket, a carrier' for the knife slidably mounted in the guide, a link connecting the feed dog carrier to the to end of the guide, a rock shaft mounted in t e bracket and having one arm connected to the slide and mother arm connected to a link extending through the well of the Work support into operative relation *ith an eccentric on the shaft.

" 12.111 21 sevlin machine having a main. shaft and. a feed clog, a. trimming knife positioned transverselv of the movement of the material, a carrier for the knife, means connected to the min shaft for reciproccb ing the carrier, :1 guide for thecarrier, op-

erating means for the iced (log,

and a link substantially parallel with the direction of travel of the worl'z and connecting the feed (log operating means to said guide.

In testimony whereof we have hereunto subscribed our names to this specification.

ADELMER M. BATES, ALBERT KB ASA. 

